563503891 has 4 divisors (see below), whose sum is σ = 563554152. Its totient is φ = 563453632.

The previous prime is 563503883. The next prime is 563503903. The reversal of 563503891 is 198305365.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 198305365 = 5 ⋅39661073.

It is a cyclic number.

It is not a de Polignac number, because 563503891 - 2³ = 563503883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563513891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (140888538).

Almost surely, 2^563503891 is an apocalyptic number.

563503891 is a deficient number, since it is larger than the sum of its proper divisors (50261).

563503891 is a wasteful number, since it uses less digits than its factorization.

563503891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50260.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 563503891 is about 23738.2368974614. The cubic root of 563503891 is about 825.9725981565.

The spelling of 563503891 in words is "five hundred sixty-three million, five hundred three thousand, eight hundred ninety-one".